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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Gitlab::Database::TablesTruncate, :reestablished_active_record_base,
:suppress_gitlab_schemas_validate_connection do
include MigrationsHelpers
let(:logger) { instance_double(Logger) }
let(:dry_run) { false }
let(:until_table) { nil }
let(:min_batch_size) { 1 }
let(:main_connection) { ApplicationRecord.connection }
let(:ci_connection) { Ci::ApplicationRecord.connection }
let(:test_gitlab_main_table) { '_test_gitlab_main_table' }
let(:test_gitlab_ci_table) { '_test_gitlab_ci_table' }
# Main Database
let(:main_db_main_item_model) { table("_test_gitlab_main_items", database: "main") }
let(:main_db_main_reference_model) { table("_test_gitlab_main_references", database: "main") }
let(:main_db_ci_item_model) { table("_test_gitlab_ci_items", database: "main") }
let(:main_db_ci_reference_model) { table("_test_gitlab_ci_references", database: "main") }
let(:main_db_shared_item_model) { table("_test_gitlab_shared_items", database: "main") }
# CI Database
let(:ci_db_main_item_model) { table("_test_gitlab_main_items", database: "ci") }
let(:ci_db_main_reference_model) { table("_test_gitlab_main_references", database: "ci") }
let(:ci_db_ci_item_model) { table("_test_gitlab_ci_items", database: "ci") }
let(:ci_db_ci_reference_model) { table("_test_gitlab_ci_references", database: "ci") }
let(:ci_db_shared_item_model) { table("_test_gitlab_shared_items", database: "ci") }
subject(:truncate_legacy_tables) do
described_class.new(
database_name: database_name,
min_batch_size: min_batch_size,
logger: logger,
dry_run: dry_run,
until_table: until_table
).execute
end
shared_examples 'truncating legacy tables on a database' do
before do
skip_if_multiple_databases_not_setup
# Creating some test tables on the main database
main_tables_sql = <<~SQL
CREATE TABLE _test_gitlab_main_items (id serial NOT NULL PRIMARY KEY);
CREATE TABLE _test_gitlab_main_references (
id serial NOT NULL PRIMARY KEY,
item_id BIGINT NOT NULL,
CONSTRAINT fk_constrained_1 FOREIGN KEY(item_id) REFERENCES _test_gitlab_main_items(id)
);
SQL
main_connection.execute(main_tables_sql)
ci_connection.execute(main_tables_sql)
ci_tables_sql = <<~SQL
CREATE TABLE _test_gitlab_ci_items (id serial NOT NULL PRIMARY KEY);
CREATE TABLE _test_gitlab_ci_references (
id serial NOT NULL PRIMARY KEY,
item_id BIGINT NOT NULL,
CONSTRAINT fk_constrained_1 FOREIGN KEY(item_id) REFERENCES _test_gitlab_ci_items(id)
);
SQL
main_connection.execute(ci_tables_sql)
ci_connection.execute(ci_tables_sql)
internal_tables_sql = <<~SQL
CREATE TABLE _test_gitlab_shared_items (id serial NOT NULL PRIMARY KEY);
SQL
main_connection.execute(internal_tables_sql)
ci_connection.execute(internal_tables_sql)
# Filling the tables
5.times do |i|
# Main Database
main_db_main_item_model.create!(id: i)
main_db_main_reference_model.create!(item_id: i)
main_db_ci_item_model.create!(id: i)
main_db_ci_reference_model.create!(item_id: i)
main_db_shared_item_model.create!(id: i)
# CI Database
ci_db_main_item_model.create!(id: i)
ci_db_main_reference_model.create!(item_id: i)
ci_db_ci_item_model.create!(id: i)
ci_db_ci_reference_model.create!(item_id: i)
ci_db_shared_item_model.create!(id: i)
end
allow(Gitlab::Database::GitlabSchema).to receive(:tables_to_schema).and_return(
{
"_test_gitlab_main_items" => :gitlab_main,
"_test_gitlab_main_references" => :gitlab_main,
"_test_gitlab_ci_items" => :gitlab_ci,
"_test_gitlab_ci_references" => :gitlab_ci,
"_test_gitlab_shared_items" => :gitlab_shared,
"_test_gitlab_geo_items" => :gitlab_geo
}
)
allow(logger).to receive(:info).with(any_args)
end
context 'when the truncated tables are not locked for writes' do
it 'raises an error that the tables are not locked for writes' do
error_message = /is not locked for writes. Run the rake task gitlab:db:lock_writes first/
expect { truncate_legacy_tables }.to raise_error(error_message)
end
end
context 'when the truncated tables are locked for writes' do
before do
legacy_tables_models.map(&:table_name).each do |table|
Gitlab::Database::LockWritesManager.new(
table_name: table,
connection: connection,
database_name: database_name
).lock_writes
end
end
it 'truncates the legacy tables' do
old_counts = legacy_tables_models.map(&:count)
expect do
truncate_legacy_tables
end.to change { legacy_tables_models.map(&:count) }.from(old_counts).to([0] * legacy_tables_models.length)
end
it 'does not affect the other tables' do
expect do
truncate_legacy_tables
end.not_to change { other_tables_models.map(&:count) }
end
it 'logs the sql statements to the logger' do
expect(logger).to receive(:info).with("SET LOCAL lock_timeout = 0")
expect(logger).to receive(:info).with("SET LOCAL statement_timeout = 0")
expect(logger).to receive(:info)
.with(/TRUNCATE TABLE #{legacy_tables_models.map(&:table_name).sort.join(', ')} RESTRICT/)
truncate_legacy_tables
end
context 'when running in dry_run mode' do
let(:dry_run) { true }
it 'does not truncate the legacy tables if running in dry run mode' do
legacy_tables_models = [main_db_ci_reference_model, main_db_ci_reference_model]
expect do
truncate_legacy_tables
end.not_to change { legacy_tables_models.map(&:count) }
end
end
context 'when passing until_table parameter' do
context 'with a table that exists' do
let(:until_table) { referencing_table_model.table_name }
it 'only truncates until the table specified' do
expect do
truncate_legacy_tables
end.to change(referencing_table_model, :count).by(-5)
.and change(referenced_table_model, :count).by(0)
end
end
context 'with a table that does not exist' do
let(:until_table) { 'foobar' }
it 'raises an error if the specified table does not exist' do
expect do
truncate_legacy_tables
end.to raise_error(/The table 'foobar' is not within the truncated tables/)
end
end
end
context 'with geo configured' do
let(:geo_connection) { Gitlab::Database.database_base_models[:geo].connection }
before do
skip unless geo_configured?
geo_connection.execute('CREATE TABLE _test_gitlab_geo_items (id serial NOT NULL PRIMARY KEY)')
geo_connection.execute('INSERT INTO _test_gitlab_geo_items VALUES(generate_series(1, 50))')
end
it 'does not truncate gitlab_geo tables' do
expect do
truncate_legacy_tables
end.not_to change { geo_connection.select_value("select count(*) from _test_gitlab_geo_items") }
end
end
end
end
context 'when truncating gitlab_ci tables on the main database' do
let(:connection) { ApplicationRecord.connection }
let(:database_name) { "main" }
let(:legacy_tables_models) { [main_db_ci_item_model, main_db_ci_reference_model] }
let(:referencing_table_model) { main_db_ci_reference_model }
let(:referenced_table_model) { main_db_ci_item_model }
let(:other_tables_models) do
[
main_db_main_item_model, main_db_main_reference_model,
ci_db_ci_item_model, ci_db_ci_reference_model,
ci_db_main_item_model, ci_db_main_reference_model,
main_db_shared_item_model, ci_db_shared_item_model
]
end
it_behaves_like 'truncating legacy tables on a database'
end
context 'when truncating gitlab_main tables on the ci database' do
let(:connection) { Ci::ApplicationRecord.connection }
let(:database_name) { "ci" }
let(:legacy_tables_models) { [ci_db_main_item_model, ci_db_main_reference_model] }
let(:referencing_table_model) { ci_db_main_reference_model }
let(:referenced_table_model) { ci_db_main_item_model }
let(:other_tables_models) do
[
main_db_main_item_model, main_db_main_reference_model,
ci_db_ci_item_model, ci_db_ci_reference_model,
main_db_ci_item_model, main_db_ci_reference_model,
main_db_shared_item_model, ci_db_shared_item_model
]
end
it_behaves_like 'truncating legacy tables on a database'
end
context 'when running in a single database mode' do
before do
skip_if_multiple_databases_are_setup
end
it 'raises an error when truncating the main database that it is a single database setup' do
expect do
described_class.new(database_name: 'main', min_batch_size: min_batch_size).execute
end.to raise_error(/Cannot truncate legacy tables in single-db setup/)
end
it 'raises an error when truncating the ci database that it is a single database setup' do
expect do
described_class.new(database_name: 'ci', min_batch_size: min_batch_size).execute
end.to raise_error(/Cannot truncate legacy tables in single-db setup/)
end
end
def geo_configured?
!!ActiveRecord::Base.configurations.configs_for(env_name: Rails.env, name: 'geo')
end
end
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